I must say that it was an interesting premise. The fact that they try to calm down the animal rather than fighting them wasn't bad at all, and even though it was dumb at many moments to not make it too easy to recognize them, it still was interesting enough. Some of the characters does have a charm and all in all it was easy to follow the show. But, it just falls flat halfway. I'll try to put it simply: the direction changed halfway. I do not know if that is the person who changed or if someone tried to make it more for children, but it wasreally easy to feel it the moment it happened.

The show became dumber, and it wasn't smart to begin with, so it really felt like a children's show. The kind of those that are killing the child's brain cells.
Consequently, the characters became dumber too killing the charm established until then.
Most of the episodes felt completely like a filler.
It is a Precure, most of the show is fillers and yet, it REALLY felt like a filler. Until then, there was still something in each episode, whether it is that they are getting used to being a Precure or any minor things, but at this moment, there was simply nothing.

The power balance became to naught.
I do understand that when a Precure not ally becomes one of the main group, there is a big power down to put them at the same level, and yet, it was awful in this case.
As it is always the case, a new Precure got added at some point.
She never made it. This last one was almost never on screen and didn't appear most of the time, making you wonder, why did they even bother adding her? Wasn't it better to simply keep things how they were?

Last, even when there was a story, it still felt like a filler.
Amazing work to do: the moment a key person at the enemy side got taken care of, I finally realized that it was actually an impactful moment and not just the usual episode of the week.

As such, it was just disappointing.
I do not know why this shift happened, but it sure didn't do any good.
They tried to recover it later on but they weren't quite able to. Making Wonderful an overall boring show.